Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Marine Environment & Safety
Journal Basic Information
Journal DOI :
The Korean Society of Marine Environment and safety
Editor in Chief :
Volume & Issues
Volume 22, Issue 4 - Jun 2016
Volume 22, Issue 3 - May 2016
Volume 22, Issue 2 - Apr 2016
Volume 22, Issue 1 - Feb 2016
Selecting the target year
A Study on the Inflowing Pollution Load and Material Budgets in Hampyeong Bay
Kim, Jong-Gu ; Jang, Hyo-Sang ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 1~10
DOI : 10.7837/kosomes.2016.22.1.001
In this paper, an analysis of the inflowing pollution load of the rivers in Hampyeong bay showed the average organic matter pollution loads of BOD, COD, and TOC to be 79.7 kg-BOD/day, 144.06 kg-COD/day, and 93.0 kg-TOC/day, respectively. The inflowing organic matter pollution load was the heaviest in Sonbul dike, followed by Jupo bridge and Yangman complex. With regard to season, the load characteristics were outstanding in July, the rainy period in the summer. The average inflowing pollution loads of nutrients were 20.9 kg-DIN/day, 17.1 kg-DIP/day, 148 kg-TN/day, and 37.4 kg-TP/day A comparison of the inflowing nutrients loads for each river showed the load to be the heaviest in Yangman complex, followed by Baegok bridge and Jupo bridge. In the experiment on the material budgets of Hampyeong bridge conducted using a box model, the detention time of fresh water was found to be 52.4 days, with the bay displaying the characteristics of a so dissolved inorganic nitrogen (DIN) in the nutrients material budgets,
values were found to be negative, indicating the tendency of consumption and open sea leak by photosynthesis to be higher than the nitrogen that flowed in. As for dissolved inorganic phosphorus (DIP),
showed positive values, indicating a tendency for accumulation as the supply through organic matter decomposition, elution load of sediments, and inflowing load of the river turned out to be higher than the consumption by phytoplankton and outflow to open sea.
Distribution of Water Temperature and Common Squid Todarodes pacificus Paralavae around Korean Waters in 2013, 2014
Kim, Yoon-Ha ; Lee, Chung Il ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 11~19
DOI : 10.7837/kosomes.2016.22.1.011
Field observation for oceanic conditions and paralarvae of the common squid, Todarodes pacificus in Korean waters were sampled with the Bongo net (diameter: 60 cm, mesh size:
) by using oblique tow method with the oceanographic research vessel (Tamgu 12 and Tamgu 20) around Korean waters (middle of the Yellow Sea, northern part of the East China Sea, East Sea) in 2013 and 2014 was carried out. The observation in the Yellow Sea and the northern part of the East China Sea was done in August, 2013 and in the East Sea it was repeated at seven times from June, 2013 to September, 2014. The paralarvae in August of 2013 was not found in the Yellow Sea and one paralarvae was found in the northern part of the East China Sea. In the East Sea, 39 paralarvae during whole observation period were found, mantle length of paralarvae was from 1.7 to 13.5 mm. Surface water temperature in the Yellow Sea was
, and cold water mass lower than
was occupied in the deep layer than 30 m. In the northern part of the East China Sea, surface water temperature was
, and higher water temperature above
was found in deeper than 50 m. In the East Sea, optimum temperature for survival,
, was existed shallower than 75 m.
Estimation on Average Residence Time of Particulate Matters in Geoje Bay using Particle Tracking Model
Kim, Jin-Ho ; Hong, Sok-Jin ; Lee, Won-Chan ; Kim, Jeong-Bae ; Kim, Hyung-Chul ; Kim, Dong-Myung ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 20~26
DOI : 10.7837/kosomes.2016.22.1.020
The residence time measures the time spent by a water parcel or a pollutant in a given water body. So residence time of water is widely used as an indicator of how a substance will remain in an estuary and it is used to enable comparisons among different water bodies. To estimate residence time of particulate matters from land and aquaculture, EFDC that includes particle tracking model was applied to the Geoje Bay. Modelled average residence time was about 65 days in the inner part. It meant it takes about 2 months for substance from land and aquaculture to be transported to the outside of Geoje Bay. The results indicated that residence time varied spatially throughout Geoje Bay depending on tidal flushing and, in general conditions, tidal flushing exerts the greatest influence to the flushing of Geoje Bay. This reveals relationships between residence times of particulate matters and physical properties of the bay and Geoje Bay is vulnerable to water quality problem.
Community Structure and Health Assessment of Macrobenthic Assemblages at Spring and Summer in Geoje-Hansan Bay, Southern Coast of Korea
Jung, Rae Hong ; Seo, In-Soo ; Choi, Byoung-Mi ; Choi, Minkyu ; Yoon, Sang-Pil ; Park, Sang Rul ; Na, Jong Hun ; Yun, Jae Seong ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 27~41
DOI : 10.7837/kosomes.2016.22.1.027
This study was performed to investigate the community structure and health assessment of macrobenthic assemblages in Geoje-Hansan Bay, Southern Coast of Korea. Macrobenthos were collected by van Veen grab sampler at May (spring) and August (summer) 2013. The total species number and mean density were 300 species
, respectively. The major dominant species were the polychaetes Lumbrineris longifolia (
), Aphelochaeta monilaris (
), the bivalve Musculista senhousia (
) and the polychaete Praxillella affinis (
). From the community statistics [cluster analysis and nonmetric multidimentional scaling (NMDS) ordination], the macrobenthic community was distinguished into two groups of inner bay (farming ground of near Sandal Island) and channel station(from Hansan Island to Chubong Island) group. In this study, the ecological status was assessed by four biotic indices Shannon's H', the ATZI Marine Biotic Index (AMBI), multivariate-AMBI (M-AMBI) and the Environment Conservation Index (ECI). The ecological status of the macrobenthic community in Geoje-Hansan Bay were poorer in the inner bay station than in the channel station. The results of the present study showed that three biotic indices (Shannon's H', M-AMBI and ECI) were valid as an index for evaluating the ecological status than the AMBI.
Effects of Dissolved Organic Nitrogen on the Growth of Dominant Phytoplankton in the Southwestern Part of East Sea in Late Summer
Kwon, Hyeong-Kyu ; Jeon, Seul-Gi ; Oh, Seok-Jin ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 42~51
DOI : 10.7837/kosomes.2016.22.1.042
We investigated the distribution of dissolved nutrients, phytoplankton community structure and utilization of nitrogen compounds by dominant species in the southwestern part of East Sea in September, 2014. Dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) were lower in the surface layer, and concentrations were increased with depth. Dissolved organic nitrogen (DON) and dissolved organic phosphorus were the opposite of dissolved inorganic nutrients. Although DIN DIP ratio in all of the water masses was higher than Redfield ratio (16), DIN : DIP ratio in mixed layer was about 2, indicating that inorganic nitrogen is the limiting factor for the growth of phytoplankton. In particular, DON proportion in dissolved total nitrogen was about 88 % in the mixed layer where inorganic nitrogen is limiting factor. The dominant species Chaeotceros debilis and Prorocentrum minimum were able to grow using DIN as well as DON such as urea and amino acids. Therefore, DON utilization of phytoplankton may play a role as a survival strategy in the DIN-limited conditions of East Sea.
A Study on the Development of HNS Database for Response System of Marine Spill Accident in Korea
Park, Mi Ok ; Park, Hyeon-Sil ; Kim, Taehong ; Oh, Sangwoo ; Lee, Moonjin ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 52~58
DOI : 10.7837/kosomes.2016.22.1.052
In this study we collected various substance codes, physical and chemical properties, and hazard level of the 545 HNS which was determined earlier, and constructed the Korean HNS database including International Maritime Dangerous Goods (IMDG) codes,, informations of explosive and corrosive characteristics of HNS after reviewing of US, Japan and European Database. And also problems of present HNS Database which focused mainly on land-based environment and an absence of information for chemical and physical properties of mixed substance HNS are reported. For the efficient implementation of comprehensive HNS management system, we constructed the basic model for the HNS database in marine environment and made suggestions for improvement for the future development of HNS Database to be prepared for the marine spill accidents.
Modeling for Pollution Contribution Rate of Land based Load in Masan Bay
Jung, Woo-Sung ; Hong, Sok-Jin ; Lee, Won-Chan ; Kim, Hyung-Chul ; Kim, Jin-ho ; Kim, Dong-Myung ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 59~66
DOI : 10.7837/kosomes.2016.22.1.059
Pollution contribution rate that is effect on water quality from land based load in Masan bay was showed quantifiably for coastal water quality management by using ecological model. It was calculated by difference of water quality concentration at each points t hat is calculated by each scenarios that are presence or absence of each sources (16 points). Results show that, rivers of Northern Masan bay contributed in Masan bay COD is 20 %, T-P is 62 % at northern part and COD is 10 %, T-P is 16 % at middle part. As a result, rivers of Northern Masan bay had effect on water quality of northern Masan bay and middle Masan bay. Also, T-P load affects water quality bigger than COD load, because T-P contribution rate bigger than COD contribution rate of northern rivers. Dukdong WTTP that is land pollution source of southern Masan bay contributed in Masan bay COD is 26 %, T-P is 11% at middle part, COD is 17 %, T-P is 7 % at middle part and COD is 10 %, T-P is 1 % at outer part. It affects water quality bigger at southern and middle of Masan bay than outer bay, because residual flow of bottom flows toward inner of Masan bay nearby Dukdong WTTP.
A Basic Study on Safe Mooring Guide for Dangerous Goods Berths in Ul-San Port
Kang, Won-Sik ; Park, Young-Soo ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 67~73
DOI : 10.7837/kosomes.2016.22.1.067
This study analyzed the state of the vessels which were using the berth for dangerous goods more than its carrying capacity in the major dangerous cargo handling port of Ulsan in Korea, The result of the analysis showed that a ship which has 3 times more than the maximum berthing capacity was moored at berth. Accordingly, a simulation model for 50,000 DWT berth was built and carried out the mooring safety analysis with 50,000 DWT, 70,000 DWT and 100,000 DWT vessels by mooring assessment program. The evaluation was carried out according to the standard environment presented in OCIMF standards. 50,000 DWT vessel was evaluated to meet the acceptable criteria but, 70,000 DWT and 100,000 DWT vessels exceeded the acceptable limit as per external conditions. Consequently, safe mooring guidelines were suggested and also proposed the building of common 'Mooring safety guideline' for port with assessment of different cases.
A Study on Walking Characteristics of Novices at Onboard Environments under Blackout Conditions in a Training Ship
Hwang, Kwang-Il ; Cho, Ik-Soon ; Lee, Yun-Sok ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 74~81
DOI : 10.7837/kosomes.2016.22.1.074
Because most of the passengers are not accustomed with onboard environments, it is very important to analyze and predict the behaviors' characteristics of passengers under disasters' conditions, and apply those results for making countermeasures. On this view point, this study focused on the walking characteristics of onboard-novices are tested and analyzed under blackout condition that has high possibility to happen. As a result, comparing to under normal lighting conditions, the waking times under blackout conditions are 155.8~247.1 % longer on full path, 56.9~331.7 % on corridors, 75.3~152.9 % on stairs, respectively. And under the same blackout conditions, walking times in cases of the exit guidance marks being attached on top side of walls saved times, like 21.6~24.0 % on full path, 37.7~58.9 % on corridors, 18.7~19.2 % on stairs, comparing to the cases of exit guidance marks being not attached. On the other hand, after tests under without exit guidance marks, 60.7% among respondents answered that internal structures like wall/stair (35.7 %) and handrail (25 %) are very helpful to decide way findings, and 28.6 % selected personal instincts is important. But 50 % responded that exit guide marks are effective to find ways, after the tests under with exit guidance marks.
Wave Response Analysis for Pontoon-type Pier: Very Large Floating Structure
Lee, Sang-Do ; Park, Sung-Hyeon ; Kong, Gil-Young ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 82~89
DOI : 10.7837/kosomes.2016.22.1.082
In this study, we proposed a pier of pontoon-type, "Very Large Floating Structure" (VLFS), with the length of 500m, breadth of 200 m and height of 2 m in Yeosu domestic port. Since this structure ought to endure wave loads for long periods at sea, it is essential to analyze the wave response characteristics. Direct-method is used to analyze the fluid-structure problem and the coupled motion of equation is used to obtain response results. The structural part is calculated by using finite element method (FEM) and the fluid part is analyzed by using boundary element method (BEM). Dynamic responses caused by the elastic deformation and rigid motion of structure are analyzed by numerical calculation. To investigate response characteristics of the pier in regular waves, several factors such as the wavelength, water depth, wave direction and flexural rigidity of structure are considered. As a result, wave response of pier changed at the point of
1.5 and represented the torsional phenomenon according to the various incident waves. And the responses showed increasing tendency as the water depths increase at the incident point in case of
and peak point of vertical displacement amplitude moved from side to side as the flexural rigidity of structure changes.
A Study on the Development of Risk Assessment for Sunken Vessels Using Remaining-Fuel Estimations Model
Chang, Woo-Jin ; Lee, Seung-Hyun ; Yeom, Hong-Jun ; Lee, In-Cheol ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 90~97
DOI : 10.7837/kosomes.2016.22.1.090
Sunken vessels accidents have harmful impacts on the marine environment because of oils and chemicals in the vessels. The government has managed them and developed risk assessment which can evaluate potential risk quantitatively since 1999. But the grades of present risk assessment has changed greatly depending on quantity of remaining fuel oils, and the list of remaining fuel oils omitted in status report of sunken vessels. Therefore, the aim of the study is to estimate and develop model for quantity of remaining fuel oils and verify the remaining fuel estimation comparison with active vessels. To accomplish the purpose of the study, apply this verified estimation model to current risk assessment and recommend guideline for an accurate sunken vessels risk assessment.
A Study on the Collision Risk Perception Index to OOW's According to Vessel Encountering Situations
Kim, Dae-Sik ; Yim, Jeong-Bin ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 98~107
DOI : 10.7837/kosomes.2016.22.1.098
The purpose of this study is for Human error prevention to acquire Collision Risk Perception Index (CRPI) sensed by the Officer Of the Watch (OOW) when the approaching distances are reduced in six types of ship encountering situations (Head on,
, Overtaking, Overtaken) between own ship and a target ship and then to predict CRPI fitting coefficients with polynomials in the curve-fitting process. CRPI acquisition experiments are carried out on two coast-guard ships and with the total of 30 crew members. Analysing results shows that CRPI data have goodness of fit to the six types of encountering situation. Futhermore, the One-Way ANOVA results show that CRPI has a negative affect to the OOW's age, career and license grade as the approaching distances is reduced. The availability of CRPI curve fitting with 3 degrees of polynomial was testified through the RMSE as 1.19 to Head on, 0.87 to
, 0.81 to
, 0.71 to
, 1.29 to Overtaking and 0.87 to Overtaken.
Conceptual Design of a Portal System for International Shipping's Greenhouse Gas Monitoring, Reporting, and Verification
Kang, Nam-seon ; Lee, Beom-seok ; Kim, Sang-yong ; Lee, Jung-jin ; Yoon, Hyeon-kyu ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 108~117
DOI : 10.7837/kosomes.2016.22.1.108
In this paper, a portal system compatible with MRV regulation was designed to monitoring, reporting and verifying
emission and fuel consumption data from an international ship. A portal system supports monitoring and reporting task of international shipping companies and calculates national greenhouse gas inventory. EU MRV law, MRV discussions of IMO, responses of international shipping companies to ship energy efficiency and greenhouse gas regulation, and greenhouse gas statistics on international shipping were analyzed to drive portal system requirements. For ship energy efficiency and
emitted monitoring, a data collection module was designed based on on-board equipment, energy efficiency measuring device and navigation report. Data transfer module with easy management and minimized usage to transfer ship data to shore was designed. A portal system was designed to convert the collected data into the standard reporting format, perform monitoring, statical analysis, verification and auto report generation, and support national greenhouse gas inventory.
Effects of Scale Ratio on Flow Characteristics in Moonpool
Lee, Sang Bong ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 118~122
DOI : 10.7837/kosomes.2016.22.1.118
When a geometric size of moonpool and an inflow velocity are determined based on the similarity of Froude number, Reynolds number is depending on the scale ratio of moonpool geometry. It means that different characteristics of flow fluctuations in moonpool can be observed depending on the scale ratio of moonpool even though Froude number is the same. In the present study two dimensional numerical simulations were performed to investigate the influence of scale ratios on the flow characteristics inside the moonpool. The inflow velocity at several scale ratios was determined to keep Froude number constant. A periodic response was observed in a small size of moonpool while a large moonpool showed complicated fluctuations with various amplitudes and frequencies, which made it difficult to distinguish the statistical steady-state response from the temporal responses in the case of large moonpool. The similarity of Froude number gave rise to a spectral characteristic which was inversely proportional to the square root of scale ratios (
) but a low frequent occurrence of strong vortex (
)which is observed inside the large moonpool was characterized depending on scale ratios.
A Study on the Hydrodynamic Effect of Biofouling on Marine Propeller
Seo, Kwang-Cheol ; Atlar, Mehmet ; Goo, Bonguk ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 123~128
DOI : 10.7837/kosomes.2016.22.1.123
The effect of propeller surface roughness condition on ship performance is very significant even the influence of fouling on propeller performance is not well established compared to biofouling on the hull surface. In present study, predictions of open water efficiency of propeller are made for three different fouling conditions, and its application is given for the 7m full-scale propeller of a medium-size tanker in open water condition. The numerical predictions of propeller efficiency loss due to fouling are based on the results from laboratory-scale drag measurements and boundary layer similarity law analysis presented in Schultz (2007) together with an in-house unsteady lifting surface code which is an appropriate tool to predict the effect of propeller surface roughness on propeller performance. The results of this study indicate that the subject propeller with the small calcareous fouling (
) can lead to as high as 15 % loss at the propeller operating condition (J=0.5) and the loss of propeller efficiency due to fouling should be evaluated while the ship is operating.
A Study on the Feedforward Control Algorithm for Dynamic Positioning System Using Ship Motion Prediction
Song, Soon-Seok ; Kim, Sang-Hyun ; Kim, Hee-Su ; Jeon, Ma-Ro ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 129~137
DOI : 10.7837/kosomes.2016.22.1.129
In the present study we verified performance of feed-forward control algorithm using short term prediction of ship motion information by taking advantage of developed numerical simulation model of FPSO motion. Up until now, various studies have been conducted about thrust control and allocation for dynamic positioning systems maintaining positions of ships or marine structures in diverse sea environmental conditions. In the existing studies, however, the dynamic positioning systems consist of only feedback control gains using a motion of vessel derived from environmental loads such as current, wind and wave. This study addresses dynamic positioning systems which have feedforward control gain derived from forecasted value of a motion of vessel occurred by current, wind and wave force. In this study, the future motion of vessel is forecasted via Brown's Exponential Smoothing after calculating the vessel motion via a selected mathematical model, and the control force for maintaining the position and heading angle of a vessel is decided by the feedback controller and the feedforward controller using PID theory and forecasted vessel motion respectively. For the allocation of thrusts, the Lagrange Multiplier Method is exploited. By constructing a simulation code for a dynamic positioning system of FPSO, the performance of feedforward control system which has feedback controller and feedforward controller was assessed. According to the result of this study, in case of using feedforward control system, it shows smaller maximum thrust power than using conventional feedback control system.
The Study of Corrosion Behavior for Solution and Aging Heat Treated Ti alloy
Baik, Shin-Young ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 138~144
DOI : 10.7837/kosomes.2016.22.1.138
Titanium is resistant to general corrosion and in sea water because of the passivity layer film on the surface of material, but may be attacked by environments that cause breakdown of the protective oxide layer including hydrochloric, sulfuric and phosphoric acids. In this study, the Ti alloys were solution heat treatment 5hours at
, and followed by aging heat treated, 1, 4, 8 and 16 hours in
respectively. The heat treated specimens were measured micro Vicker's hardness, and then accomplished electrochemical polarization test for comparing corrosion in 1N sulfuric acid solution. Additionally, micro structures were taken for corrosion tested specimens. The results showed that corrosion resistance was higher in solution heat treated alloy than base and age heat treated metal. Measured corrosion resistants were increased as increasing aging heat treatment time and temperature.
Temperature Variabilities at Upper Layer in the Korean Marine Waters Related to Climate Regime Shifts in the North Pacific
Rahman, SM M. ; Lee, Chung Il ;
Journal of the Korean Society of Marine Environment & Safety, volume 22, issue 1, 2016, Pages 145~151
DOI : 10.7837/kosomes.2016.22.1.145
Temperature variability at the upper layer related to climate regime shifts in the Korean waters was illustrated using water temperature, climate index. Three major climate regime shifts (CRS) in 1976, 1988 and 1998 in north Pacific region had an significant influence on the major marine ecosystems structure pattern. Three marginal seas around Korean peninsula; East Sea, East China Sea and Yellow Sea also got important impact from this kind of decadal shift. We used 10m sea water temperatures in four regions of Korean waters since 1950 to detect major fluctuation patterns both seasonally and also decadal shift. 1988 CRS was occurred in all of the study areas in most seasons however, 1998 CRS was only detected in the Yellow Sea and in the southern part of the East Sea. 1976 CRS was detected in all of the study area mainly in winter. After 1998 CRS, the water temperature in the southern part of the East Sea, East China Sea and Yellow Sea were going into decreased pattern; however, in the northern part of the East Sea, it was further shifted to increasing pattern which was started from 1988 CRS period.